in series
— Adjective
– English
～ of or relating to the sequential performance of multiple operations; "serial processing"
immune serum globulin
— Noun
– English
～ a class of proteins produced in lymph tissue in vertebrates and that function as antibodies in the immune response
Iraqi Intelligence Service
— Noun
– English
～ the most notorious and possibly the most important arm of Iraq's security system; "the Iraqi Mukhabarat has been involved in numerous terrorist activities"
Internal Revenue Service
— Noun
– English
～ the bureau of the Treasury Department responsible for tax collections
intelligence service
— Noun
– English
～ a unit responsible for gathering and interpreting information about an enemy